EverdDrive-N8 Features:
Famicom, NES, and Twin Famicom systems are supported.* Many NES/FC clones supported as well.
Cart supports NES and FDS ROM images.
Automatic disk side swap for FDS.
Expansion audio.**
Save State function
Game Genie cheat code support.
Automatically backs-up saves to SD card. There is no need to push reset before shutting down the system.***
Mapper support can be extended via software updates. As easy as loading new mappers files on SD card.
FAT / FAT16 / FAT32 file system formats are supported.
Supports SD (SD & SDHC) cards up to 32GB.
Quick loading of game files (approx. 4-8 seconds).
USB port for home-brew and mappers development (optional).
EverdDrive-N8 hardware:
Powerful Cyclone II FPGA.
2 x 512Kbyte SRAM for PRG and CHR data.
128Kbyte battery backed memory. It write save data to SD.
Max II CPLD to handle FPGA reconfiguration, BIOS, SD and USB interfaces.
1Mbyte flash BIOS.
Voltage shift buffers on PPU and CPU bus for matching levels between 5v NES bus and 3.3 EverDrive bus. Far better than simple resistor buffers at reducing noise and power consumption.
* Famicom version of cart requires Famicom to NES adapter to be used with NES. NES version of cart requires NES to Famicom adapter to be used withFamicom.
** Only Famicom can output expansion sound without modification. NES systems require modification to support this feature.
*** FDS is the only exception, user should push the reset button on system to get back to main menu before than shutting down the system, otherwise FDS save data will be lost.

SD/SDHC/SDXC support (tested up to 64GB; no exFAT support so SDXC cards must be reformatted using FAT32)
High quality push-push memory card slot
Fast ROM loading (~9MB/s)
Fast menu navigation
Directories are sorted automatically, no need for FAT sorting tools
High resolution menu (512×224) for adequate display of long file names
Real Time Clock
Supports ROM size up to 128MBit (96Mbit actually implemented)
Automatic near-time SRAM saving to SD Card (while the game runs). Some limitations apply:
near-time saving is switched to periodic saving when a game is found to use the SRAM as work RAM.
Automatic saving is disabled when MSU1 is used. SRAM is saved on reset.
Enhancement chip support (see below for implementation status)
SuperCIC key (SNES CIC clone):
enables operation on unmodified consoles of all regions
supports software 50/60Hz switching on SuperCIC enhanced consoles only (to be performed by sd2snes firmware, not yet implemented there)
Auto region patching: eliminates “This Game Pak is not designed…” messages regardless of 50/60Hz setting
Enhancement chips

Supports 99% of games from SEGA library
SEGA Master System Games supported
SEGA 32x games supported
CD-BIOS Loading function
Hardware MegaKey
Max. ROM size up to 7Mbyte
Return to menu after reset
High compatibility with chinese clone systems
SRAM auto backup on SD card
Supported SD/MMC up to 32GB
FAT16 and FAT32 are supported
GameGenie cheat codes
Simple menu
New version of cartridge has better compatibility with Chinese clones, improved user interface, cartridge hardware was improved as well. New cartridge allows to go back to the menu after reset, the cart can play multi game ROMs. EverDrive-MD V3 loads the OS directly from SD card at each startup, instead of flashing OS to internal flash memory, it allows to avoid possible damage to the cart during an OS update.

Max supported ROM size up to 8mbit (1mbyte)
SMS and SG-1000 games are supported
Supported standard sega mapper and codemasters mapper
Cart can be used on GameGear via Gear Master adapter
USB port for homebrew development*
OS can be updated from SD or USB
Save ram data can be stored or loaded from SD card
SD/MMC cards support.
FAT16 support. 2GB max partition size
Supported SD/MMC size 2GB max
Flashed game will stay in memory after power off. so no need to choice and reflash game after each reset or power off cart comes without a shell, but standard shell can be used
*USB port available only on "Master Everdrive +USB" cart version

* Homebrew software could communicate with PC via virtual serial port interface. All USB port operations controlled by SMS Z80 CPU, so USB port can not be used if cart not attached to console

Max supported ROM size up to 8mbit (1mbyte)
GaeGear and SMS games are supported
Supported standard sega mapper and codemasters mapper
USB port for homebrew development*
OS can be updated from SD or USB
Save ram data can be stored or loaded from SD card
Micro SD cards support.
FAT16 support. 2GB max partition size
Supported Micro SD size 2GB max
Flashed game will stay in memory after power off. so no need to choice and reflash game after each reset or power off cart comes without a shell, but standard shell can be used (without modify)
*USB port available only on "Everdrive GG+USB" cart version

* Homebrew software could communicate with PC via virtual serial port interface. All USB port operations controlled by GG Z80 CPU, so USB port can not be used if cart not attached to console.